Mariners Prospect No. 23: Jonathan Arias

Jonathan Arias, RHP, Clinton Lumberkings (A, 21.8 years old on average in 2011)

6-3, 190 lbs, 24 years old

Bats: Right, Throws: Right

Acquired: International Signing (2006)

ETA: 2015

Don’t be fooled by Arias’ age. He was signed as a catcher, and one with a great arm and good defensive skills, but he didn’t hit. He pitched for the first time in 2009, and had limited success. Last year he pitched 63.1 innings, averaging 14.4 K/9 and 5.4 BB/9 while posting a 3.27 ERA in 39 appearances, all in relief. Arias figures to have a high-leverage arm, and he finished nine games in 2011. This isn’t the first time a rocket-armed prospect has had success in the Mariners system, Rafael Soriano became one of the game’s best relievers after beginning his career as a shortstop with the Mariners. 2012 will be a huge season for Arias, who figures to get a promotion, but who must improve his command and secondary pitches if he wants to make it to the majors.